frontend, python: allow ignoring errors that a project already exists

Fix #2140

frontend/coprs_frontend/coprs/forms.py

@@ -262,7 +262,7 @@ def __call__(self, form, field):
 
 class CoprUniqueNameValidator(object):
 
-    def __init__(self, message=None, user=None, group=None):
+    def __init__(self, message=None, user=None, group=None, exist_ok=False):
         if not message:
             if group is None:
                 message = "You already have a project named '{}'."
@@ -273,6 +273,8 @@ def __init__(self, message=None, user=None, group=None):
             user = flask.g.user
         self.user = user
         self.group = group
+        self.exist_ok = exist_ok
+        self.copr = None
 
     def __call__(self, form, field):
         if self.group:
@@ -282,6 +284,11 @@ def __call__(self, form, field):
             existing = CoprsLogic.exists_for_user(
                 self.user, field.data).first()
 
+        # Save the existing copr instance, so we can later return it without
+        # querying the database again
+        if existing and self.exist_ok:
+            self.copr = existing
+
         if existing and str(existing.id) != form.id.data:
             raise wtforms.ValidationError(self.message.format(field.data))
 
@@ -704,7 +711,7 @@ def errors(self):
 class CoprFormFactory(object):
 
     @staticmethod
-    def create_form_cls(user=None, group=None, copr=None):
+    def create_form_cls(user=None, group=None, copr=None, exist_ok=False):
         class F(CoprForm):
             # also use id here, to be able to find out whether user
             # is updating a copr if so, we don't want to shout
@@ -717,7 +724,8 @@ class F(CoprForm):
                 validators=[
                     wtforms.validators.DataRequired(),
                     NameCharactersValidator(),
-                    CoprUniqueNameValidator(user=user, group=group),
+                    CoprUniqueNameValidator(user=user, group=group,
+                                            exist_ok=exist_ok),
                     NameNotNumberValidator()
                 ])
 

frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_projects.py

@@ -26,7 +26,7 @@
     project_delete_input_model,
     fullname_params,
     pagination_project_model,
-    ownername_params,
+    project_params,
     pagination_params,
 )
 from coprs.views.apiv3_ns.schema.docs import query_docs
@@ -139,7 +139,7 @@ def get(self, ownername, projectname):
 class ProjectList(Resource):
     @restx_pagination
     @query_to_parameters
-    @apiv3_projects_ns.doc(params=ownername_params | pagination_params)
+    @apiv3_projects_ns.doc(params=project_params | pagination_params)
     @apiv3_projects_ns.marshal_list_with(pagination_project_model)
     @apiv3_projects_ns.response(
         HTTPStatus.PARTIAL_CONTENT.value, HTTPStatus.PARTIAL_CONTENT.description
@@ -184,25 +184,39 @@ def get(self, query, **kwargs):
 @apiv3_projects_ns.route("/add/<ownername>")
 class ProjectAdd(Resource):
     @restx_api_login_required
-    @apiv3_projects_ns.doc(params=ownername_params)
+    @query_to_parameters
+    @apiv3_projects_ns.doc(params=project_params)
     @apiv3_projects_ns.marshal_with(project_model)
     @apiv3_projects_ns.expect(project_add_input_model)
     @apiv3_projects_ns.response(HTTPStatus.OK.value, "Copr project created")
     @apiv3_projects_ns.response(
         HTTPStatus.BAD_REQUEST.value, HTTPStatus.BAD_REQUEST.description
     )
-    def post(self, ownername):
+    def post(self, ownername, exist_ok=False):
         """
         Create new Copr project
         Create new Copr project for ownername with specified data inserted in form.
         """
+        exist_ok = flask.request.args.get("exist_ok") == "True"
         user, group = owner2tuple(ownername)
         data = rename_fields(get_form_compatible_data(preserve=["chroots"]))
-        form_class = forms.CoprFormFactory.create_form_cls(user=user, group=group)
+        form_class = forms.CoprFormFactory.create_form_cls(user=user, group=group,
+                                                           exist_ok=exist_ok)
         set_defaults(data, form_class)
         form = form_class(data, meta={"csrf": False})
 
         if not form.validate_on_submit():
+            if exist_ok:
+                # This is an ugly hack to avoid additional database query.
+                # If a project with this owner and name already exists, the
+                # `CoprUniqueNameValidator` saved its instance. Let's find the
+                # validator and return the existing copr instance.
+                for validator in form.name.validators:
+                    if not isinstance(validator, forms.CoprUniqueNameValidator):
+                        continue
+                    if not validator.copr:
+                        continue
+                    return to_dict(validator.copr)
             raise InvalidForm(form)
         validate_chroots(get_input_dict(), MockChrootsLogic.get_multiple())
 

frontend/coprs_frontend/coprs/views/apiv3_ns/schema/fields.py

@@ -406,6 +406,14 @@
     )
 )
 
+exist_ok = Boolean(
+    description=(
+        "Don't fail if a project with this owner and name already exist, "
+        "return the existing instance instead. Please be aware that the "
+        "project attributes are not updated in such case."
+    )
+)
+
 # TODO: these needs description
 
 chroot_repos = Raw()

frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py

@@ -481,8 +481,9 @@ class FullnameSchema(ParamsSchema):
 
 
 @dataclass
-class OwnernameSchema(ParamsSchema):
+class ProjectParamsSchema(ParamsSchema):
     ownername: String
+    exist_ok: Boolean
 
 
 # OUTPUT MODELS
@@ -515,5 +516,5 @@ class OwnernameSchema(ParamsSchema):
 package_get_params = PackageGet.get_cls().params_schema()
 project_chroot_get_params = ProjectChrootGet.get_cls().params_schema()
 fullname_params = FullnameSchema.get_cls().params_schema()
-ownername_params = OwnernameSchema.get_cls().params_schema()
+project_params = ProjectParamsSchema.get_cls().params_schema()
 pagination_params = PaginationMeta.get_cls().params_schema()

frontend/coprs_frontend/tests/test_apiv3/test_projects.py

@@ -426,3 +426,25 @@ def test_perms_set_sends_emails_2(self, send_mail):
         r = self.auth_post('/request/user2/barcopr', permissions, u)
         assert r.status_code == 200
         assert len(calls) == 2
+
+    @TransactionDecorator("u1")
+    @pytest.mark.usefixtures("f_users", "f_users_api", "f_mock_chroots", "f_db")
+    def test_add_exist_ok(self):
+        route = "/api_3/project/add/{}".format(self.transaction_username)
+        data = {"name": "foo", "chroots": ["fedora-rawhide-i386"]}
+
+        # There is no conflict, we can obviously create the project
+        response = self.api3.post(route, data)
+        assert response.status_code == 200
+
+        # The project already exists
+        response = self.api3.post(route, data)
+        assert response.status_code == 400
+        assert "already have a project" in json.loads(response.data)["error"]
+
+        # When using exist_ok, the request is successful, and existing project
+        # is returned
+        route += "?exist_ok=True"
+        response = self.api3.post(route, data)
+        assert response.status_code == 200
+        assert json.loads(response.data)["full_name"] == "user1/foo"

python/copr/v3/proxies/project.py

@@ -72,7 +72,7 @@ def add(self, ownername, projectname, chroots, description=None, instructions=No
             delete_after_days=None, multilib=False, module_hotfixes=False,
             bootstrap=None, bootstrap_image=None, isolation=None, follow_fedora_branching=True,
             fedora_review=None, appstream=False, runtime_dependencies=None, packit_forge_projects_allowed=None,
-            repo_priority=None):
+            repo_priority=None, exist_ok=False):
         """
         Create a project
 
@@ -115,6 +115,7 @@ def add(self, ownername, projectname, chroots, description=None, instructions=No
         endpoint = "/project/add/{ownername}"
         params = {
             "ownername": ownername,
+            "exist_ok": exist_ok,
         }
         data = {
             "name": projectname,